Final answer:
The definite article 'las' and the noun 'bolígrafos' do not agree in gender and number
Step-by-step explanation:
The definite article 'las' is feminine and plural, while the noun 'bolígrafos' is feminine and plural as well. Therefore, the definite article and noun agreement in 'las bolígrafos' is incorrect.
Learn more about Definite article and noun agreement in Spanish